‘Do you doubt now, Hastings?’ asked Poirot.

I believe I had up to that moment. But now I doubted no longer.

Poirot closed the case again and turned to the maid.

‘You do not know with whom Miss Adams dined yesterday evening?’

‘No, sir.’

‘Do you know with whom she had lunch or tea?’

‘I know nothing about tea, sir. I believe she lunched with Miss Driver.’

‘Miss Driver?’

‘Yes, her great friend. She has a hat shop in Moffat Street, just off Bond Street. Genevieve it’s called.’

Poirot noted the address in his notebook just below that of the doctor.

‘One thing more, Madame. Can you remember anything – anything at all – that Mademoiselle Adams said or did after she came in at six o’clock that strikes you as at all unusual or significant?’

The maid thought for a moment or two.

‘I really can’t say that I do, sir,’ she said at last. ‘I asked her if she would have tea and she said she’d had some.’

‘Oh! she said she had had it,’ interrupted Poirot. ‘Pardon. Continue.’

‘And after that she was writing letters till just on the time she went out.’

‘Letters, eh? You do not know to whom?’

‘Yes, sir. It was just one letter – to her sister in Washington. She wrote to her sister twice a week regular. She took the letter out with her to post because of catching the mail. But she forgot it.’

‘Then it is here still?’

‘No, sir. I posted it. She remembered last night just as she was getting into bed. And I said I’d run out with it. By putting an extra stamp on it and putting it in the late fee box it would be all right.’

‘Ah! – and is that far?’

‘No, sir, the post office is just around the corner.’

‘Did you shut the door of the flat behind you?’

Bennett stared.

‘No, sir. I just left it to – as I always do when I go out to post.’

Poirot seemed about to speak – then checked himself.

‘Would you like to look at her, sir?’ asked the maid tearfully. ‘Looks beautiful she does.’

We followed her into the bedroom.

Carlotta Adams looked strangely peaceful and much younger than she had appeared that night at the Savoy. She looked like a tired child asleep. 

There was a strange expression on Poirot’s face as he stood looking down on her. I saw him make the sign of the Cross.

‘J’ai fait un serment, Hastings,’ he said as we went down the stairs.

I did not ask him what his vow was. I could guess.

A minute or two later he said:

‘There is one thing off my mind at least. I could not have saved her. By the time I heard of Lord Edgware’s death she was already dead. That comforts me. Yes, that comforts me very much.’

Our next proceeding was to call upon the doctor whose address the maid had given us.

He turned out to be a fussy elderly man somewhat vague in manner. He knew Poirot by repute and expressed a lively pleasure at meeting him in the flesh.

‘And what can I do for you, M. Poirot?’ he asked after this opening preamble.

‘You were called this morning, M. le docteur, to the bedside of a Miss Carlotta Adams.’

‘Ah! yes, poor girl. Clever actress too. I’ve been twice to her show. A thousand pities it’s ended this way. Why these girls must have drugs I can’t think.’

‘You think she was addicted to drugs, then?’

‘Well, professionally, I should hardly have said so. At all events she didn’t take them hypodermically. No marks of the needle. Evidently always took it by the mouth. Maid said she slept well naturally, but then maids never know. I don’t suppose she took veronal every night, but she’d evidently taken it for some time.’

‘What makes you think so?’

‘This, dash it – where did I put the thing?’

He was peering into a small case.

‘Ah! here it is.’

He drew out a small black morocco handbag.

‘There’s got to be an inquest, of course. I brought this away so that the maid shouldn’t meddle with it.’

Opening the pochette he took out a small gold box. On it were the initials C.A. in rubies. It was a valuable and expensive trinket. The doctor opened it. It was nearly full of a white powder.

‘Veronal,’ he explained briefly. ‘Now look what’s written inside.’

On the inside of the lid of the box was engraved:

C.A. from D. Paris, Nov. 10th. Sweet Dreams.

‘November 10th,’ said Poirot thoughtfully.

‘Exactly, and we’re now in June. That seems to show that she’s been in the habit of taking the stuff for at least six months, and as the year isn’t given, it might be eighteen months or two years and a half – or any time.’

‘Paris. D,’ said Poirot, frowning. 

‘Yes. Convey anything to you? By the way, I haven’t asked you what your interest is in the case. I’m assuming you’ve got good grounds. I suppose you want to know if it’s suicide? Well, I can’t tell you. Nobody can. According to the maid’s account she was perfectly cheerful yesterday. That looks like accident, and in my opinion accident it is. Veronal’s very uncertain stuff. You can take a devil of a lot and it won’t kill you, and you can take very little and off you go. It’s a dangerous drug for that reason.

‘I’ve no doubt they’ll bring it in Accidental Death at the inquest. I’m afraid I can’t be of any more help to you.’

‘May I examine the little bag of Mademoiselle?’

‘Certainly. Certainly.’

Poirot turned out the contents of the pochette. There was a fine handkerchief with C.M.A. in the corner, a powder puff, a lipstick, a pound note and a little change, and a pair of pince-nez.

These last Poirot examined with interest. They were gold-rimmed and rather severe and academic in type.

‘Curious,’ said Poirot. ‘I did not know that Miss Adams wore glasses. But perhaps they are for reading?’

The doctor picked them up.

‘No, these are outdoor glasses,’ he affirmed. ‘Pretty powerful too. The person who wore these must have been very short-sighted.’ 

‘You do not know if Miss Adams–’

‘I never attended her before. I was called in once to see a poisoned finger of the maid’s. Otherwise I have never been in the flat. Miss Adams whom I saw for a moment on that occasion was certainly not wearing glasses then.’

Poirot thanked the doctor and we took our leave.

Poirot wore a puzzled expression.

‘It can be that I am mistaken,’ he admitted.

‘About the impersonation?’

‘No, no. That seems to me proved. No, I mean as to her death. Obviously she had veronal in her possession. It is possible that she was tired and strung up last night and determined to ensure herself a good night’s rest.’

Then he suddenly stopped dead – to the great surprise of the passers-by – and beat one hand emphatically on the other.

‘No, no, no, no!’ he declared emphatically. ‘Why should that accident happen so conveniently? It was no accident. It was not suicide. No, she played her part and in doing so she signed her death warrant. Veronal may have been chosen simply because it was known that she occasionally took it and that she had that box in her possession. But, if so, the murderer must have been someone who knew her well. Who is D, Hastings? I would give a good deal to know who D was.’ 

‘Poirot,’ I said, as he remained rapt in thought. ‘Hadn’t we better go on? Everyone is staring at us.’

‘Eh? Well, perhaps you are right. Though it does not incommode me that people should stare. It does not interfere in the least with my train of thought.’

‘People were beginning to laugh,’ I murmured.

‘That has no importance.’

I did not quite agree. I have a horror of doing anything conspicuous. The only thing that affects Poirot is the possibility of the damp or the heat affecting the set of his famous moustache.

‘We will take a taxi,’ said Poirot, waving his stick.